白草黃榆六十秋。For sixty years, pale grasses and yellow elms ever grew.

邊將皆承主恩澤，The frontier soldiers all received favors from His Majesty.

無人解道取涼州。 But none realized they should recover the lost Liangzhou.

PS. The ancient Liangzhou is the area including the four counties of the Hexi Corridor: Wuwei, Zhangye, Jiuquan, and Dunhuang. Not long after the Anshi Rebellion, the Tang Dynasty lost control of the area to the Tubo (吐蕃).